_ Kaname Kuran ...He is also Yuki's fianceé and "so called" brother....it has been revealed in Chapter 38 that Haruka and Juri Kuran had a son, but his soul was killed by Rido Kuran and Kaname's soul was put into his body. Kaname was the ancestor of the Kuran Family thus resurrected by Rido from the grave, who became his 'master' making him unable to kill Rido. Juri and Haruka, Yuki's parents, raised Kaname as Yuki's brother, although Kaname never fully became 'their son'..

_Yuuki and Kaname were raised as siblings by Yuki's parentsJuri and Haruka Kuran, who were also heads of the Kuran line of pureblood vampires.

_She is also Kaname's fiance.

_Rido Kuran ...Ten years ago, he was nearly killed by Kaname when Rido attempted to take Yuki's blood for unclear reasons related to his full restoration. However, Kaname couldn't strike the final blow because Rido is the one who revived Kaname, who is the Original Vampire. That is also why Kaname cannot kill him..

_Rido stole and killed the first chid of Juri and Haruka.. *** read the manga or the forum***